20222120200121 has 4 divisors (see below), whose sum is σ = 23110994514432. Its totient is φ = 17333245885812.

The previous prime is 20222120200099. The next prime is 20222120200123. The reversal of 20222120200121 is 12100202122202.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20222120200121 - 2¹⁰ = 20222120199097 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20222120200121.

It is not an unprimeable number, because it can be changed into a prime (20222120200123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1444437157145 + ... + 1444437157158.

It is an arithmetic number, because the mean of its divisors is an integer number (5777748628608).

Almost surely, 2^{20222120200121} is an apocalyptic number.

It is an amenable number.

20222120200121 is a deficient number, since it is larger than the sum of its proper divisors (2888874314311).

20222120200121 is an equidigital number, since it uses as much as digits as its factorization.

20222120200121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2888874314310.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 20222120200121 its reverse (12100202122202), we get a palindrome (32322322322323).

The spelling of 20222120200121 in words is "twenty trillion, two hundred twenty-two billion, one hundred twenty million, two hundred thousand, one hundred twenty-one".